Abstract
Introduction We created a nominal computer record of vaccinations accompanied by a system notifying failure to vaccinate through personal reminder letters. The aim of this study was to analyze the effectiveness of this system in improving vaccination coverage and in reducing the proportion of failure to vaccinate. Material and methods The Babyvac-2000 ® computer program based on Microsoft Access ®, was used to review 3,161 vaccination cards.We analyzed the total number of doses expected, the doses administered, the reminder letters sent, the answers to these letters and the real failures to vaccinate after the intervention. Children aged 14 years of age were considered separately and all were sent a letter reminding them of vaccination. Results A total of 802 reminder letters (5.48% of the total number of doses expected) were sent. Of these, 503 subjects attended vaccination (62.72%), and 299 letters (37.28%) were returned undelivered, 243 of which (30.3%) were due to change of residence, leaving 56 children (6.98%) as real failures. The reminder letter improved coverage by 5.1%, from 94.52% at the beginning to 99.62%. Coverage in 14-year-old children also improved, reaching 86.47%. Conclusions This computer program reduced the percentage of failure to vaccinate and substantially increased the vaccination coverage. The use of a life-long National Vaccination Register, with reminder letters to prevent failure to vaccinate, should be considered.
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